# Unit Converter | Converter4U vs Fuelify

The clearest difference is ads: Unit Converter | Converter4U at none against Fuelify's shown. Unit Converter | Converter4U also leads on device support (3 vs 1) and iOS requirement (9.0 vs 17.6). Fuelify's advantage is update cadence (every 2 weeks vs every 4 months). On price and in-app purchases there is nothing between them.

Both are free to download. Neither carries in-app purchases, so what you see is what you pay.

Unit Converter | Converter4U ships an update every 4 months, Fuelify every 2 weeks. The most recent releases landed on August 14, 2026 and September 5, 2026 respectively.

## The numbers

| Metric | Unit Converter | Converter4U | Fuelify |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[4.6 (194 ratings)](https://appshunter.io/ios/app/unit-converter-converter4u/id620969788/reviews)** | — |
| Number of ratings | **194** | — |
| Positive reviews | 57.1% of reviews | — |
| In-app purchases | No | No |
| Ads | **No** | Yes |
| Update frequency | Every 4 months | **Every 2 weeks** |
| Monetization | Free | — |
| Size | 51 MB | 5 MB |
| Requires iOS | **9.0** | 17.6 |
| Devices | **iPhone, iPad, iPod** | iPhone |
| Age rating | 4+ | 4+ |
| Developer | [VisTech.Projects LLC](https://appshunter.io/developer/620969851) | [Cagın BOGURCU](https://appshunter.io/developer/1777423234) |

## What reviewers say

### Unit Converter | Converter4U

[App page](https://appshunter.io/ios/app/unit-converter-converter4u/id620969788)

This app provides a powerful and intuitive way to convert between a wide range of units, including length, weight, temperature, and more. It offers simultaneous conversion of multiple units and customizable options for a personalized experience. Get instant, accurate results for all your conversion needs.

**Highlights:** Simultaneous multi-unit conversion, Customizable unit options, Copy converted values to clipboard, Supports numerous measurement categories, Intuitive and user-friendly interface

**Features:** macOS Compatibility, Vision Pro support

**In-app purchases:** none


### Fuelify

[App page](https://appshunter.io/ios/app/fuelify/id6755497232)

**In-app purchases:** none


## Frequently asked questions

### Is Unit Converter | Converter4U free?

Unit Converter | Converter4U is free to download, with no in-app purchases.

### Is Fuelify free?

Fuelify is free to download, with no in-app purchases.

### Do Unit Converter | Converter4U or Fuelify have ads?

Fuelify shows ads; Unit Converter | Converter4U does not.

### Which is updated more often, Unit Converter | Converter4U or Fuelify?

Unit Converter | Converter4U ships an update every 4 months, and Fuelify every 2 weeks. Most recently, Unit Converter | Converter4U was updated on August 14, 2026 and Fuelify on September 5, 2026.

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*Compared by [AppsHunter](https://appshunter.io/) from daily US App Store data. Review summaries are generated from verbatim App Store reviews.*